54 entries under adjective topic. ×

43
infectious(move, unhealthy, widespread, fatal)
22
catching(verb, move, widespread, toxic)
16
communicable(move, able, widespread, catching)
16
transmissible
13
epidemic(noun, widespread, catching, toxic)
13
spreading(verb, communicable)
11
deadly(foul, unhealthy, communicable)
8
transmittable(catching, toxic, spreading, infectious)
8
taking(verb, move, catching, infectious)
6
noxious(foul, unhealthy)
6
poisonous(foul, unhealthy, baneful, communicable)
6
pestilential(foul, communicable)
5
toxic
4
endemic(widespread, wide-ranging, infectious, communicable)
4
pestiferous(annoying, communicable)
3
contractable
3
malignant
3
zymotic
3
epizootic(communicable, insalubrity)
3
pestilent(unhealthy, dangerous)
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APASmart Define. (2015). contagious thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/contagious/thesaurus/synonyms
ChicagoSmart Define. 2015. "contagious thesaurus" https://smartdefine.org/contagious/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, contagious thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/contagious/thesaurus/synonyms>.
MLASmart Define. "contagious thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/contagious/thesaurus/synonyms>